Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September is marked by a minor reduction in average high-temperature, sliding from a warm 79.3°F (26.3°C) in August to an agreeable 72.3°F (22.4°C). In September, the average low-temperature records at a cool 52.3°F (11.3°C) during the nights.Humidity
The average relative humidity in September is 80%.Rainfall
In September, in Altoona, the rain falls for 13.5 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. Throughout the year, there are 165 rainfall days, and 25.31" (643mm) of precipitation is accumulated.Snowfall
In Altoona, snow does not fall in June through September.Daylight
In Altoona, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:41 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:56 pm EDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: In September, a daily UV index of 3 turns into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Altoona?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Altoona have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Altoona have in September?
What is the UV index intensity in September?
Average temperature in September
Altoona, PA
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in September
Altoona, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Altoona, PA
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Altoona, PA
- Average humidity in September: 80%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April and July (77%).
Average rainfall in September
Altoona, PA
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is November (1.57").
Average rainfall days in September
Altoona, PA
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (9.8 days).
Average snowfall in September
Altoona, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Altoona, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Altoona, PA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Altoona, PA
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (15.3 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in September
Altoona, PA
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Altoona, PA
- Average cloud cover in September: 42
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Altoona, PA
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Altoona, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location